Hi,
My name is Igor. It's a pleasure for me to help others and I'll try to help you. I am merely a fellow user trying to provide insight and information that may be helpful to others.
Each properly installed and properly operating device should be presented in the Device manager regardless of a driver installation.
Your device is absent in Device manager, so it is either faulty or improperly connected. Was your PC disassembled (may be partially) or repaired recently?
And please check carefully all devices in Device manager, maybe there was a different driver installed, and the device is mentioned under improper name.